Imagine you are cruising in outer space in a spaceship when you notice an asteroid hurtling towards your ship. You fire a missile and score a direct hit. The asteroid explodes into a billion pieces. Would you hear the explosion? Explain your answer.
Sound on the most basic level is a series of vibrations of an object. On Earth, we hear sounds due to the vibrations of an object hitting air molecules, which then travels to our ears where our brains can then identify them. In space, however, there is no air so there is no medium for the sound waves to travel through. So, you shouldn’t hear the asteroid exploding.